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. ● J. 1. i0 = 0 I = 5 a t = 5 c




J.1. I 0 = 0 I = 5 A t = 5 c. , .

●J.2. R , , : ) 1 7, ) 1 5, ) 1 3. r.

●J.3. l = 500 , I = 5 A.

J.4. ρ = 100 ∙. C = 4,0 . U = 2,0 .

●J.5. , R 1, U 1 = 198 , R 2 = 2 R 1 U 2 = 180 . R 1 , Rv = 900 .

●J.6. S = 0,2 2 I = 0,2 A. , . ρ = 26 ∙.

J.7. a b. ρ. . .

J.8. , ρ 1 ρ 2, . , 1 2 I.

J.9. C = 400 R = 650 U 0. U = 0,9 U 0?

J.10. r 1 r 2, r 1 < r 2. R, ( ?) .

J.11. , r 1 r 2.

J.12. . r. R A B.

J.13. , - R, -, C. t = 0 U. T , , , q = k (T - T 0), k , T 0 ( ).

J.14. , R 1, R 1 = 10 , R 2 = 20 , R 3 = 30 1, 2, 3 φ 1 = 10 , φ 2 = 6 , φ 3 = 5 .

J.15. r R, , . R , , ?

J.16. , η = 0,60 . C = 20 . U = 100 . . : ) ; ) , .

J.17. C R. U 0, t = 0 K. : ) I t; ) , I (t).

J.18. , U = 600 , R 0 = 5,0 . I = 50 .

●J.19 R = 120 I 0 = 0 I max = 5 A τ = 15 c. , .

J.20. 10 A/2. , ρ = 17 ∙.

●J.21. R 1 = R 2 = R 3 = 100 . U v = 200 , R v = 800 . , .

J.22. , ε = 2,1 τ = 3,0 . , , .

●J.23. 1,5 r = 0,2 . , , R = 0,2 ? .

J.24. 10 A 0,18 , 100 . , 100 A? ?

●J.25. = 2 , R 1 = 60 , R 2 = 40 , R 3 = R 4 = 20 R G = 100 . I G, .

J.26. - . 2A 7 . , 5,5 , 5 .

J.27. R q, : ) ∆ t; ) , ∆ t ?

 

 





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